Motion-picture apparatus.



G. SCHMID.

MOTION PICTURE APPARATUS.

APPLICATION FILED AUG.I4. 1915.

1,202,107. Patented Oct. 24,191

GwsZaI/e 502011225 IN V ENTOR.

A TTORNE YS.

GIISTAVE SCHMID, OF CHICAGO, ILLINOIS.

MOTION-PICTURE APPARATUS.

Specification of Letters Patent.

Patented Oct. 24, 1916.

Application filed August 14, 1915. Serial No. 45,515.

To all whom it may concern;

Be it known that I, GUSTAVE SCHMID, a citizen of the United States,residing at Ohicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Motion-PictureApparatus, of which the following is a specification.

This invention relates to motion picture apparatus, and moreparticularly to the mechanism which intermittently feeds the film, thesame comprising a device which grips the film, moves it forward, and isthen retracted to take another hold on the film to advance the sameanother step.

The invention has for its object certain improvements in the grippingdevice, whereby a more efiicient and steady feed is produced, as will bedescribed hereinafter and claimed.

In order that the invention may be better understood, reference is hadto the accompanying drawing, in which Figure 1 is a front elevation ofthe mechanism; Fig. 2 is an edge view thereof; Fig. 3 is a centralvertical section, of the mechanism; Fig. 4 is a horizontal section onthe line AA of Fig. 1, and Fig. 5 is an edge view of a cam.

Referring specifically to the drawing, 5 denotes a base plate along oneside of which the film 6 travels, the same having uniformly spacedperforations 7 along its edges as usual. On the other side of the baseplate is mounted the feeding mechanism of the film. This mechanismcomprises two pins 8 spaced to conform to the spacing of the two rows ofperforations 7 and adapted to be advanced to enter the same, and thenmoved downward to feed the film one step. The pins are then retractedand returned to feed the film forward another step. In the base areparallel slots 9 in which the pins work. The following mechanism isprovided for operating the pins:

On the base plates), alongside the slots 9, are mounted undercut guidestrips 10, between which is mounted a slide 11 having end apertures inwhich the pins 8 are slidably mounted. The rear ends of the pins areconnected by a cross bar 12 having midway between its ends a guide stud13 which seats slidably in an aperture in a lug 14 on the back of theslide. The stud 13 carries laterally projecting pins 15 formingabutments,

purpose to be presently determediate its ends, the lever is fulcrumed ona stud 24 carried by a bracket 25 mounted on the slide 11. The slot 23and the outer edge of the part 22 of the lever are curved on arcs havingfor their centers the pivot 24 of the lever 21, and on saidedge of thepart 22 is fixed a cam 26 designed to move the stud 13 in the directionof its length, the pins 15 being located between the cam and engageablethereby to effect this movement of the stud, and as the stud is on thecross bar 12 carrying the pins 8, the latter are alternately advanced toenter the perforations 7, and retracted and withdrawn from theperforations.

When the pinion 17 is in motion, the lever 21 .is oscillated about thestud 24 to advanceand retract the pins 8 through the cam mechanism, andat the same time, the slide 11 is reciprocated by the pitman 19, tocarry the pins up and down in the slots 9. The parts are so designedthatthe pins are advanced when they are at the upper ends of the slotsand they remain advanced to feed the film 6 during their travel down theslots. 'At the end of the downward'travel of the pins, they areretracted to release the film, and they then move back in retractedposition to the upper ends of the slots for the next feed stroke,without touching the film.

The pinion 17 is geared to a suitable actuating mechanism which need notbe shown or described as it forms no part of the present invention.

I claim 1. A film feed for motion picture apparatus, comprising areciprocatlng slide, filmengaging fingers carried by the slide andmovable into and out of engaging position, an abutment carried by thefingers, a rotatable driving element, a pitman connection between saidelement and the slide for reciprocating the latter, an oscillatoryelement carried by the slide and obtaining motion from the drivingelement, and a cam on the a cross bar connecting the rear ends of thefingers, an abutment earned by the cross. bar, a rotatable drivingelement, a pitman connection between said element and the slide forreciprocating the latter, an oscillatory element carried by the slideand obtaining motion from the driving element, and a cam on theoscillatory element engaging the abutment to alternately advance andretract the film-engaging fingers, said fingers being advanced on thefeed stroke and retracted on the return stroke. I y

3. A film feed for motion'picture apparatus, comprisinga reciprocatingslide, filmengaging fingers earned by the slide and movable into and outof engaging position, an abutment carried by the fingers, a rotatabledriving element, a wrist pin on said element, a pitman connected at oneend to the wrist pin and at the other end tothe slide for reciprocatingthe slide, a lever pivoted to the slide and connected at one endto thewrist pin, and a cam on the other end of the lever engaging the abutmentto alternately advance and retract the film-engaging fingers, saidfingers being advanced on the feed stroke and retracted on the returnstroke.

4. A film feed for motion picture appara tus, comprising a reciprocatingslide, filmengaging fingers carried by. the slide and movable intoandout of engaging position, an abutment carried by the fingers, arotatable driving element, a wrist pin on said element, a pitmanconnected at one end to the wrist pin, a connection between the otherend of the pitman and the slide, a lever pivoted to the slide andconnected atone end to the wrist pin and having at the other end anarcuate slot in which the aforesaid connection seats, and a cam on thelast mentioned end of the lever engaging the aforesaid abutment toalternately advance and retract the film-engaging fingers.

In testimony whereof I afiix my signature inpresence of two witnesses.

GUSTAVE SCHMID.

Witnesses:

S. J. LEHRER,

H. G. BATCHELOR.

